Bug summary

When using Color like described here https://matplotlib.org/stable/tutorials/colors/colors.html for the Axes grid, the alpha value is ignored.

Code for reproduction

import numpy as np
fig, ax = plt.subplots()
rng = np.random.default_rng(12345)
ax.plot(rng.integers(low=0, high=10, size=3))
ax.grid(color=(0.8, 0.8, 0.8, 0))
fig.show()

Actual outcome

Expected outcome

Additional information

No response

Operating system

Windows

Matplotlib Version

3.5.1

Matplotlib Backend

module://backend_interagg

Python version

3.9.2

Jupyter version

No response

Installation

pip